Restart dev server on lockfile change

.changeset/good-geese-run.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Restart dev server on lockfile change

packages/astro/src/core/config/settings.ts

@@ -121,7 +121,15 @@ export async function createSettings(config: AstroConfig, cwd?: string): Promise
 
 	let watchFiles = [];
 	if (cwd) {
-		watchFiles.push(fileURLToPath(new URL('./package.json', pathToFileURL(cwd))));
+		// We don't official support Bun, Yarn Berry, and Yarn 1 should not be used by anyone.
+		// Ok to add other obscure package managers.
+		const packageFiles = ['package.json', 'package-lock.json', 'pnpm-lock.yaml'];
+
+		for(const file of packageFiles) {
+			const rel = `./${file}`;
+			const url = new URL(rel, pathToFileURL(cwd));
+			watchFiles.push(fileURLToPath(url));
+		}
 	}
 
 	if (typeof tsconfig !== 'string') {

packages/astro/test/units/dev/restart.test.js

@@ -171,6 +171,31 @@ describe('dev container restarts', () => {
 		}
 	});
 
+	it('Is able to restart project on lockfile changes', async () => {
+		const fs = createFs(
+			{
+				'/src/pages/index.astro': ``,
+			},
+			root,
+		);
+
+		const restart = await createContainerWithAutomaticRestart({
+			fs,
+			inlineConfig: { root: fileURLToPath(root), logLevel: 'silent' },
+		});
+		await startContainer(restart.container);
+		assert.equal(isStarted(restart.container), true);
+
+		try {
+			let restartComplete = restart.restarted();
+			fs.writeFileSync('/pnpm-lock.yaml', `{}`);
+			triggerFSEvent(restart.container, fs, '/pnpm-lock.yaml', 'change');
+			await restartComplete;
+		} finally {
+			await restart.container.close();
+		}
+	});
+
 	it('Is able to restart on viteServer.restart API call', async () => {
 		const fs = createFs(
 			{